Digital Tax Service · Guidance

What a Self Assessment tax return costs

Last reviewed: Next review: Reviewed by the Digital Tax Service editorial team

The costs on each route

RouteCostRight when…
DIY via HMRC onlineFreeSimple affairs, comfortable with the forms
Our fixed fee (standard SA100)£199 + VATDirectors, dividends, landlords, first-timers
Complex return (quoted first)From £199 + VATForeign income, capital gains, messy records
Doing nothing£100 → £1,600+Never — penalties accrue even with no tax due

What the fee actually buys

  • Every income source in the right box — salary, dividends, interest, rent, with the paperwork to back it
  • Claims you might not know about — allowable expenses, pension relief for higher-rate taxpayers, marriage allowance, gift aid
  • Your bill (or refund) confirmed before filing, with payment dates and payments on account explained
  • Filed online with HMRC and the submission receipt sent to you

For directors we prepare the return from the company’s own records — salary and dividends always match what the company reported, which is exactly what HMRC’s systems check.

Self Assessment for company directors

Already late? The maths favours speed

The £100 penalty is sunk — but £10/day starts three months after the deadline, and the 6-month penalty is the higher of £300 or 5% of the tax due. Records to us this week beats records to us next month, every time. Call 0114 327 1480.

All our fixed fees

Frequently asked questions

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Need help with Making Tax Digital?

Ask us anything about MTD, or request that we register or file for you. Call 0114 327 1480 or send a message below.